Machine for nailing straps to band sticks



April 2, 1940. M. F. M LEOD MACHINE FOR MAILING STRAPS T0 BAND STICKS Filed Sept. 22, 1937 9 Sheets-Sheet 2 m m w i M U m TORNEY April 2, 1940. M. F. McLEOD 2,195,421

MACHINE FOR MAILING STRAPS TO BAND STICKS Filed Sept. 22, 1937 9 Sheets-Sheet 3 my. a

INVENTOR Murdoc; McLeod E ATTORNEY April 2, 1940. MCLEOD 2,195,421

MACHINE FOR MAILING STRAPS TQ'BAND STICKS Filed Sept. 22, 1937 9 Sheets-Sheet 4 INVENTOR AITTORNEY A April 2, 1940. M. F. McLEOD 2.195,42l magma FOR mauve STRAPSC T0 BAND STICKS Filed Sept. 22, 1957 9 Sheets-Sheet 5 4 9 0 6 3 7 6 6 e 5 6 5 5 N\\\\\\\\\\ z 1 N\ \QE 8 4 L I, .H 5 6 7 6?" I INVENTOR 3| Afardock F. We Lead A BY ATTORNEY April 2, 1940. M. F. McLEOD MACHINE FOR MAILING STRAPS T0 BAND STICKS Filed Sept. 22, 1937 9 Sheets-Sheet 6 INVENTOR FA? Murdock ATTORNEY April 2, 1940.

MACHINE FOR MAILING STRAPS TO BAND STICKS M. F. McLEOD Filed Sept. 22, 1937 9 Sheets-Sheet 7 /0 lt f fii W r I26 & 12a 1 27 I63 my. A9

I 5 1 C. 1' 12s I03 l k I V INVENTOR. Mariam? f. flfcleoa BY 12;. 2o

ATTORNEY April 2, 1940. M. F. McLEOD momma FOR mums swans TO B'AND s'r'xcxs 9 Sheets-Sheet 8 Filed Sept. 22. 1937 INVENTOR Mum 0:4; fi'fifcead ATTORNEY April 2, 1940. M. F. McLEOD 2,195,421

MACHINE FOR NAILING STRAPS T0 BAND STICKS Filed Sept. 22, 1937 9 Sheets-Sheet 9 INV EN TOR.

mama Am.- Aged ATTORNEY.

* uNirEDkfsTAT Patented Apr.

p mgumen eptem er 2 21937 ee Nae-165332 v I g .7

;This'inventionrelates to an automatic machine i fornailing mletal straps" to the end portions of band sticks glesl a N A primaryobject "of thisiinvention sitopro- Vide an automatic machinecomprising means 'fo'r supplying, positioning and supportingtheband sticks, means for f positioning metal; strap mem hers in --longitu'dinal "alignment withfthe band sticks with the end-portions of "the strap mem-I bers"oVerlapping the end portions oi -the band sticks; means for? nailing the overlapped end por-i tions of the strap members to the band sticks and means for cuttingoffthe strap 'members'at H V I v stantial-ly reducing the," cost of preparing the band a" predetermined distance from. the "band sticks and forpuncnirig'holes in the strap membersadja'cent the cut ofi end portions-thereof; 1

= In packingwooden shin glesf it iscommon prac-v nee to bind each b'undle of'shingles 'with two wooden bandv sticks, positioned. on" the top and bottom, respectively," of the bundleandextending across the bundlegland two "metal strap members projecting 'overand nailed to'the end portionsof the band sticks andextending acrossthe side "01' edgeportions of th'e bundle; "The-band sticks and strap, members {are preferablyh supplied to the shingle packer who packs the shingles with the a two strap member's nailed to the respective end portions of 'one band'stick and'th'e'outer'end portions of the strap members each punched'forvthe reception of two nails so that thepacker may lay down-aband "stick with two metal trap members? thereon; pack a bundle'jof shingles "on said "band stick, place another band stick across thetori {off the bundie" of 5lnngles-,' draw the metal strap. members upfpa'st thesides of thebundle of shin gles; bendthe punched end portionsfofthe strap members overrthe end portions of :the'upper' band stick and nail. said punched 'endzp'ortions of; the

metals-strap Vmembers to, the end portions of the 'Y 'ferred exemplary'forms of embodimentof my 1171- v =upperniost bandistick." v

.JHeretofore it hastbeen common practicetoi pre pare thesemetal strap membersfforuse by cut-' ting them .off "I to "the desired length iand: punch-' I 7 ing' both end portions of each strapmembergand; then nailing these out and'punchedstrap mem- I bers, by hand labor, to therespectivefehd '.p0r-1 ti'onss'of .the band sticksiwhi'ch are itorbe usedias the bottom band sticks for the bundles. gThe, strap members are usuallysupplied to the'shingle mills in cut. andpunched' condition and the mills-provideEthelrband sticksand supply the labor to be used for bundling-"wooden shin 1 ,members, tothe band- 'sticksfithus necessitating {several operationsysome of which arecarried out by hand. This adds --.considerablyftothe cost of making the shinglesreadjrffor market. ItIis an object ofj-this invention to providean emap members 1 an them-hand. nail the strap automatic machine which will feed in- {the-strap "members an'd'the band sticks, and whichwill'cut 'I the strapmembersto theproper length, nailone I v end of eachstrap member to a band stick and punch the other e'n'd, of each" strap member all at onetime, ithus' speeding up "the work and; sub- 1 sticks and rlmetalstrap-members for use by the shingle packers. 1

0tl1eri-fob-je'cts of- 'thi's invention are to provide s mple and efiicient feeding means for feedingfor advan'cmg :woodena-band sticks toanailing ;posi-i tion by. moving-them in aidirectio'n transversely offtheir length; to. provide simple and efficient j carriage irneans for feeding in metalr'strap meme overlappingthe end portions of. the band sticks; to: provide simple and eflicie'nt nailing means r'fo r driving,nailsethrough fithe overlapped end p01- tions of the metal strap members into the band sticksand tov provide simple and'f-eificient means 'forcutti-ng ofithemetal strap members at a pre v determinedfiistancefromthe ends of thelband ediacen t their cutioff ends The above mentioned.general objects of; in-

ventionf together with,-oth ers inherent in the same; are .atta-ined by the mechanismillustrated mane following drawings; the v same being pres 'vention', throughout whicht drawings like reference numerals indicateilike parts? ing .a nailedriving an'da punch: "and cut -3off' away, showinggraa band stick of the type used; in

bundlin'gzrfshingles with 'metalzstrapslnaiied 1170 the be after the band stick had passed through this machine; i

Fig; 6 is a detached side elevation of a nail driving. device embodied in the invention; s

Fig. 7 is a vertical sectional view-of said nail i driving device taken substantially on broken line of Fig. 8;

Fig. 8 is a vertical sectional view of said nail driving device taken substantiallyfon broken lines 8-8 ofFig'l; i

Fig. 9 is a cross section through said nail driv ing device taken substantially on broken line 9'9 of Fig. 6;

Fig. 10 is a fragmentary plan view of a portion of the nail picking mechanism by which nails are delivered to the nail driving device;

Fig. 11 is a fragmentarysectional view ofthe nail picking mechanism, taken broken line ll-l'l of Fig.110;

Fig.. 12 is a detached perspective view of parts embodied in the nailpicking mechanism;

in Fig. 25; V I I Fig. 2'? is a'fragmentary plan iew similar to Fig. 13 is a. detachedside-elevation of a nail box embodied in the invention;

3 Fig. 14 is a cross sectional View of said nail Fig.115is a detached front elevationof a ma.

embodied in the bined punch, and cut-off unit invention; Fig. 16

is a detached side elevation of said punch and cutoff unit, looking in the direction 9 indicated by line l6-l6 of Fig. 15;

Figs. 17 and 19 are fragmentary detached plan views ona larger scale thanFig. 3 of parts of the carriage means'shown "at the right of Fig. 3 and used for-advancing the metal strips;

Fig. 18 is a side elevation of the devices shown in Fig. 17 looking in the direction indicated by broken line 18-48 of Fig. 17;

Fig. 20 'isva.detached-.edgeview of a fragment of the guide member shown'in Fig;19;

Fig. 21 is asomewhat diagrammatic detached plan 'view of parts of, the driving mechanism shown in Figs. 1, 2 and 3, parts being omitted and broken away to Fig. 24 is a fragmentary .view partly'in section and partly in elevation illustrating alternative means for securing a metal. strap member to a band stockby the use of onenail instead of two nails; v

Fig. 25 is a fragmentary plan view of a modified form of nail picking means;and Fig. 26 is a View partly in section and. partly in elevation of the nail Fig. if), showing'parts of the nail picking mechanism in a different position from theposition in i which said parts are shown in Fig. '10; and more: specifically-in that phase {ofthe" operating cycle where a nail pickoif device is entered between a first and secondnail;

Fig. 28 is an elevationsimilar to Fig. 18 showing parts of the carriage for'advancing metal. straps in a different position from the position in. which-said parts are shown in Fig." 18; and" Fig. 29 is a detached perspective view of a spring member .te'mployedi as a I yielding guide and extends crosswise ,of, the machine.

substantially onpicking means shown H I I 7 2,195,421

respective ends of said band stick as they would means for metal straps which are to be secured to band sticks. i

qThe machine comprises a main frame 20 of generally rectangular shape providing a horizontal .table like portionupon which the work is done. Two upright frame members 2| extend upwardly from the sides of said main frame near the rear portion thereof and .a

plate 22 is secured'to and supported on the' upper portions of said upright frame members The upright frame members 2| and transverse plate 22 thus form a rigid frame of generally "as supporting means for punch and cutter and nail driving mechanism, as hereinafter described.

. A transverse frame bar 24, preferably of T shaped cross section, extends crosswise of the main frame 20 a short distance forwardly of the uprightframe members 21.

The upper side. of the T bar 2c is substantially flush with the top plane of the main frame, asgshownin Figs. '2 and 4.

Two band stick supporting members 25 of L shaped crosssection are positioned on the main frame In in longitudinally extending spaced apart parallel relation. These band stick supporting ,members 25 extend substantially from the front portion to} the rear portion of the main frame and rest upon the transverse T bar 24. These members 25 are adapted to support band sticks of the band sticks 26 are ordinarily about 19% inches long, about 1- inches wide, and about of an inch thick. The band stick supports 25 are positioned with their bottom flanges directed inwardly toward each ,other so as to receive and support the end portions of theband sticks and the upright flanges of the supports 25'are spaced apart a distance slightly more-than the length of {thebandsticks so that they serve as guiding and positioning means. for the band sticks. The band sticks. are stored in an upright magazine 21, (Figs. 1 and 23) which is positioned adjacent the rear side of the upright frame members 2|, said band sticks resting one upon another inface to face relation, and the ends of' the lowermost band stick resting on the supporting members'25. An oscillatory band stick feeder is "provided for feeding the band sticks forwardly on the band stick supporting members25. This band stick feeder comprises 'two upright feeder bars 28 connected with each other by cross bars 29 and *pivoted for'oscillation on a transverse'pivot shaft 30. The upper-"end portions of the feeder bars 28 are positioned at the proper height and loca-. tion so that they will engage with the lowermost bandstick and advance all of the band sticks on the supporting members 25. each time the upper end portions of said feeder bars move forwardly.

The second band stick from the bottom of the magazine will; always be above the plane of the upper ends of the feeder bars as said bus move forwardly, and said second bandstick will drop .onto' the top. ends of the feeder. bars as soon'as the lower band stick is moved out from under said sec- 33. are. secured to a shaft; 34i whichiis driven in a 75 i manner hereinafter set forth. The mechanism justbdescribed operates toadvance or feed for- 1 ward the band sticks a, distance equal to the WidthfOf one band stick .on each forward .move-. mentof the upper, end, portions of the feeder bars 28.. This provides for positioning andstopping each band stick for a predetermined period of time in alocation directly beneath certain nailing means hereinafter described. The position occupied by each band stick during the nailing operation is substantially ,above the T bar 24 as shown in Fig. 23, the band stick in the nailing 1 position being the third band stick in front of V the bottom of the magazine 21 as shown in Fig. 23,.

Th the uprightframe members 2| on both sides of themachine and serve as ,a supporting means for.

two nailing units, designated generally by and 36, and two punch and cut-off units, designated generally by 3'! and 38, see Figs. v2, 3, 4, 6,1 I Each punchancl cut-off unit} 7, 8, 9, 15 and 16. Figs. 2, 4, 15-and 16 comprises a frame plate 39 secured to the bars 23 and provided with a guide 40 for 'slidably receiving and guiding a vertically reciprocable punch plunger 4|. Each punch plunger 4| supports two punch members ordies 42 which extend downwardly from the bottom end portion thereof, These punch members 42 are spaced apart and are offset sidewise relative to each other, as shownin Figs. 4, 15 and 16,

so that the holes 43 punched thereby, see Fig. 5, in the end portion of ametal strap or band iron 44 will not be in longitudinal alignment with the band stick 26 to which the band iron is, at-

tached. -A die block 45 is rigid with the punch frame 39v and positioned below the punch members 42. Recesses 46 areprovided in the die block 45 in vertical alignment with the punch members 42. The shape. of the holes 43' is not important as long as the punch members break through the metal straps 44 enough to permit easy driving of nails 63. A cutting edge 41 is provided on the die block 45 for cooperationwith a knife 48, which is secured to the punch plunger 4!. Av guide plate 49 is positioned back of the.

knife tosupport said knife 48 in shearing 'rela- 1 tionrelative to the die block 45. A flat spring 50 -is secured to a base flange 5| of the punch frame 3srto hold the end portion of an incoming metal strap 44 in elevated position and prevent said end portion of said strap 44 fromstriking against the end of the die block'which cooperates with the knife 48. Whentheknife and metal strap 44: are moved downwardly to cut ofi' the metal strap, the elevated end portion of the spring 50 is depressed and said spring 59then moves upwardly along with the knife and moves the :end portion of the metal strap upwardly with it. As the -metal strap 44 is fed longitudinally into the machine it slides between the spring 50 and the bottom end portion ofthe guide plate 49.

Preferably thecutting edge of the knife 48 is I inclined, as shown in Fig. -16,t0 provide a shearing cut; The base flange 5| is positioned below the plane of the top of the die block 45 and the spring 50'slopes from this base flange 5| upwardly to the lower end portionof the die block. The means for reciprocating each punch plunger comprises alink 52 having itslower end portion pivotally connected with the punch. plunger 4! and its upper end-portionpivotally connected with a lever arm 5.3.which is secured to arockshaft 54. The rock shaft 54 ismounted for oscillation in suitable bearings 55 whiclrare secured to the-trans.-

1 the "band sticks.

transverse frame bars 23 extend beyond punchiandmut oif units and the nailing units and" the nail sorting and supply means are all operated from the rock shaft 54.

Each nailingunit 35 and 3.6 comprises a frame member 56, Figs.'2, 4, 6,7, 8 and 9, secured in an upright position to the transverse frame bars 23 at locations above the end portions of the f band sticks 26 where the end portions of the metal strap members 44 are to be nailed onto A vertically reciprocable driving. member '51 is guided for vertical movement in guide ,me'ans '58 on each frame member 56 and two spaced. apart naildriving plungers 59 are securedto 'eachzdriving member 51 and extend downwardly therefrom into two passageways. BG'in two nail holding chuckmembers and whichare supported by pivot means 8 The passageways 6D communicate with two inclined pasageways' fizgwhich are adaptedto have nails 63 delivered thereinto from inclined tubes 64. Theftubes 54'each; receive nails 63, one at a time,

I from nail-picking means hereinafter described.

Each nail 53 passes down the tube 64 into which it is delivered and thencedown one of the pas- I 'sagewaysEL-Si) until the point of the nail rests in an opening of smaller diameter than the nail, provided between the. two yieldingly supported chuck members. 65 and '66, see Figs. 7, 8 and 9.

Each nail S3 is thus supportedin a vertical position below one 'of'the'nail' driving plungers 59 and above the end portion of a-metal strap member which overlaps the end portion of a band stick 2B. The nails enter the passageways 69 below the driving plungers 5i while the driving plungers 59 are'in an elevated position, and when the nail driving plungers make, their downward stroke they 'engage' with'the head .portions of the nails, force the nails down through the chuck members 55 and 65 and drive said nails through the metal strap 44 andinto the band stick 26, thus securing the end portion of, a metal strap 44 to the end por- .justably supportingthe springs 6'1 and limiting the swinging movement of the jaw members. The upper end portion of the driving member 51 of each nailing unit 35-is connected by a link 68 with a lever arm 59 which is secured to the rock shaft54. i fl The nails .53 are relatively short and small and are light in weight and the nail sorting and nail. picking means must be accurately constructed to handle these nails. The nails 63 are delivered to the inclined tubes 64 by nail positioning and picking means, which is supported by two inclined frame bars '79 secured to the main fram'e'ili and upright framemembers 2!. The frame bars 70 extend forwardly and upwardly and an-inclined cross member H, pref- 1 erably of wood of substantial thickness,is secured to and supported by the frame bars 19 and extends, across the machine. A nail box 12, Figs. 1, 2, 3, 13 and 14; is secured by a hinge T3 to theedge'of the cross member 'il in alignment with through them, but will notper'mit the passage therethrough of the nail heads. I Anend wall 15 is provided in each nail box 12 at substantially the location of the hinge. This end wall 15 extends across the slots 14, and, at the location of the slots M,' said. end wall 15 is provided with notches 76, Fig.- 14, which afford just enough clearance to permit the heads of nails- 63 moving in the slots 79 to pass therethrough. The bottom of each nail box is provided with an extension 11 which projects beyond the end wall and beyond the hinge means 13 and overlaps the adjacent portion of the cross member ll. When the nail box 12 is oscillated on the hinge means 13 the extension ll moves up and down relative to the cross member ll between the position 'shownby full lines and the position shown 'by broken lines in Figure 1. The slots 14 extend to the, end of the extension 17. I vl Means is provided for oscillating both of the nail boxes 72 to agitate and shake up the nails and cause said nails to drop into the slots and hang point downward. This nail box oscillating means, see Figs. 1, 2 and. 3, comprises a shaft 1 l8 positioned below the cross members H and journaled in bearings 19, which are secured'to' i motion of the shaft 18 to the nail boxes 12.

The cross member is preferably of wood and the thickness of this cross member is greater than the length of the nails 63. Slots 85, see Figs. 3, 10 and 11, are provided in the cross-member 1! in alignment with the four slots 14 in the nail boxes l2 and extensions 1?. These slots 85 provide clearance for the nails 63. Two metal plate members 85 are secured to the top side of the cross member l! at the location of each of the four slots 95. Two metal plate members 96 of each pair'of said plate members are spaced apart far enough to provide a slot 8'! therebetween which registers with the adjacent slot 95 in the cross member I l. The nail heads rest on the plate members 85 and the nails 63 are thus suspended by their heads, and move downwardly I along the slots 85 and 87. The plate members 96 are inclined, throughout the greater portion of their length, at the same angle as the cross member H, but the lower end portions of said plate members are bent so that they will provide short end sections 89 which are substantially horizontal over which the nails 63 will travel as they pass off of said plate members. Notches 89 of shallow depth are provided in the tips of the end sections 88 for the head of the foremost nail to drop into when its movement is arrested just before it drops off of the end sections 88 of the plate members 85. When one portion of the head of a nail 63 is positioned in the notches 89 said nail is supported by and rests against a curved surface 99, see Figs. 10, 11 and 12, of a movable nail holding member 9! and another portion of the head of such nail rests in a notch 92 in the nail holding member 9|. Four of the nail holding members 9 fare provided and each nail holding member 9| is secured to a transverse bar 93 which extends crosswise of the machine adjacent the tip portions of the plate members 96. The transverse bar 93 is slidably suported in guide means 94-for reciprocatingmovement, see Figs. 1, 2 and 3. A spring 95, Fig; 3, yieldingly urges the bar 93 in one direction. Stop means 96 limits the movement of the bar 93 in thedirection in which it is urged by the spring 95; The spring 95 normally holds the bar 93 insu'ch a position as to cause the nail blocking members 9| to stop the forward movement of the nails 93-. The bar 93 is moved to the right from the position shown in Fig. 3 by a cam member 91 which is secured to the rock shaft 54 andpositioned to engage with a plate member 98 that is secured in an angular position to one end portion of the bar 93. Oscillation of the rock shaft 54 will move the cam member 9'! over the plate member 98 and this 59 are beingmoved downwardly. The nails63 are released after the plungers 59 have moved 1 down into passageways 69 and preferably-when the plungers are near their lowermost positions. The nails will slide down the tubes 64 and enter the passageways 69 at about thetime the plungers 59 are withdrawn therefrom. If the nails strike against the plungers 59' as said plungers are moving upwardly, the downward movement of the nails may be momentarily arrested but said nails will move on down to the position shown in Fig. '7 assoon as the plungers move out of the way. 1

To help in the delivery of the first or foremost nail in each. slot 81 into the adjacent inclined tube 64- whichleads down to the nail driving chuck SI and to hold back all of the nails except the first nail, I provide four nail pick off devices 99, Fig. 3, of the form shown in Figs. 10, ll andlZ. Each nail pick off device 99 is secured to the bar 93 and'has a chisel shaped end portion I90 which is adapted to enter between the foremost nail and the second nail when the bar 93 (Fig. 3) is moved to the right by the cam member 97. Each nail pick off device 99-490 is in clined,' as shown in Figs. l0, l2 and'2'7, so that it will be clearof .the first nail when the tip thereof enters between the first and second nail, see Fig. 10, and will engage with the first nail as said pick off device enters further between the first and second nail, see Fig. 2'7, and move said first nail outwardly a short distance to insure that the head of the first nail will clear the ledge 89 at the end of the members 86. As each nail pick off device 99 and each nail blocking member 9! is secured to the bar 93 they will move simultaneously and the nail blocking member will-release o'rmove out of theway of the foremost nail just after the nail pick off device has moved in behind the foremost nail and in front f the second nail; The result is that theforemost nail is released and pushed forwardly and dropped into the adjacent inclined tube while the other nails are held back until after thenail blocking member 9| has been returned to its nail blocking position. The nails'are preferably releasedin that portion of the cycle of operation of the machine in which the nail driving plungers are near the lower limits of their driving strokes, so that said nails will have ample time to slide down the inclined tubes 94 and passageways Gil-69 and find their proper positions in the chucks 65 ancl'66 as the driving plunger-s are moving upwardly and before the driving plungers move downwardly in the next driving operation. To

Y c ncher prevent the foremostnail-63' from being carried sidewlse by the blocking member .QI or pushed sidewise by the nail pick off decive I00, as said nailpick off device .enters between the .first and second nail .-I provide a spring wire I,0I which is secured to thecross member, a non-movable part of the machine, and extends into line with the foremost nail 63 so that the relatively square end of said spring wire IOI will be substantially against'the sideof the foremost nail 63 opposite to the side which is first engaged, by the nail pick off device I00. -This spring wire IOI rests against thesurface 90; of the nail blocking member SI and will always be inthe correct position and efficient operation and being more simple and compact in construction than the devices illustrated in-Figs. l0, l1 and '12.

The device/illustrated inFigs. '25 and 26' comprises two spaced apart inclined nail supporting members. H! which support the nails by-their slotsI80 between each pair of nail supporting members .I;'I*"I when the bar is inthe position of rest, shown in Fig. 25, which said bar will normally assume. Each notch H0, is just large enough and deep enough to receive the shank of a nail 03 so that. when the bar H is moved longitudinally-a nail .63, which is positioned in said notch, willbe carried'sidewise by the bar I10 I out of alignment with the nail supporting meme The upper edge of the bar IIBat the.

bers ITI location of? the notches I10 is beveled as indicated by I'S'LseeIFig. 2,6, so that as soonas the bar IIB-ismoved endwise far enoughso'that the nails in the notches l'l9 are "clear of the'ends of-. the nail supportingmembers l? I, said nails will move,

bygravity, sidewise the required distance for the nail heads-to clear the bar?! andthenails 53 will dropin-to tubes I82. The tubes {82 are substantially the .same as the tubes'fi i, except. that they preferably extend in as nearly'a straight line as possible downwardly to the nail driving chuck means 06. To provide for making the tubes E02 substantially straight and vertical, it is necessary to place the bar I18 substantially directly abovethenail driving devices; The bar I18 is preferably-urged into. the position of rest'shown in Fig. .25 byatension' spring I03, which yieldingly urges said'b'ar Il8 against astop I84. The

bar- I-l'8 may bemoved in the direction indicated by the arrow in Fig. 25, to release the nails, by

cam means, not shown, which is similar to the cam'means 9-l-98 used to move the bar 03.

The metal strap feeding devices, see especially Figs. 2, 3, 17, i8, 19, 20 and 28, are adapted to take-themetalstrap material from rolls 102, Fig. 23,.andfeed the correct amount of said strap ma- :terial into'themachineat the proper time in each cycle of operation ofthe machine. These strap 'rieeding devices are in duplicate on each side of -;th e :machine and. the following description'will apply to the strap feedingpdevice. on either side ofthe machine. Each strap feeding device comprises a carriage plate I03 having two sets of rollers I04 and I05 rotatably'mounted on one side thereof. The two sets of rollers I04 and I05 are spaced apart longitudinally of the carriage plate andthe two rollers of each setare spaced apart vertically to receive. therebetween ahori'zontal track bar I06; upon which the carriage is movably supported. The track bar I00. is fixedly secured to the outer end portion of the T bar24, see Figs. 2, 3 and 4, and extends outwardly therefrom. 'The rollers I04 and I05 preferably haveend flanges to preventsidewise displacement of saidrollers from the track bars I05. On'th'e side's opposite the rollers I04 and I05 the carriage'plates have'means for receiving, guiding, and:--releasablyclamping the metal straps M which arebeing taken off of the rolls I02. This strap guiding and clamping means comprising a guide member I01, Figs- 18 and 28, through which the strap .04 extends, and two jaw members 08 and I09 between which the strap 44 passes. The jaw members I08 and I09 preferably have teeth or serrations on the sides which grip the metal strap when the parts are in the position shown in Fig. 28 and release said metal strap when the parts of in the position shown in Fig. 18.. These jaw members I00 and 509" are secured by pivots-J10 to the respective ends of levers III and IIZPThelevers III and H2 are fulcrumed on pivots I13, which are secured to the'carriage plate I03. Preferably a guide plate H4 is positioned outwardly from the levers I H and H2 and supported on the pivots H3. This guideplate prevents the metal strap 44 from being displaced frombetween the jaws I00 and 109. The outer ends of. the levers III and 2' are connected bypivots H5 with the ends'of link- Band 9 M, respectively. The links H6 and I I! extend outwardly and are convergently inclined toward eachtotherand the outer end portions of saidflinks' arev overlapped and secured by a common pivot II-Bto a slide member II-9. The slide member H9 is slidably supported in guide members i 07 and I0I,theguide member I ill. being the same guide member, I01 through which the metal strap 44v passes. The slide member H0 is movable longitudinally of the carriage plate I03, and the movement of said slide member lifiiimparts a'togglei-motion to the links H6 and Ill; which angularlylmoves the levers i I II and .II 2, thus 'moving'the jaws I00 and I00 toward and away from 'each other'and clamping or releasing the metal strap 44.

I Movement of the slide member I Hi relative toplate I03 in an outward direction isli'mited'by' a fixed'stop I provided on the outer end portion of the carriage plate I03, and movement-of said slide member II9 relative to the plate I03, in an inward direction, is limited by. clamping engagement of the jaws we and I09 with'the'strap M. The entire carriage means, including-theslide members It 0, is adapted to be reciprocatedzby a connecting rod I-2-I, which has one endportion connected by pivot means I22with'the slide member -I I 9. The driving mechanism for: the connecting rod I2'I is hereinafter described. i

The metalstrap 04 is relatively thin and flexible and it is necessary to guide and support said metal strapbetween the jaw members I08 and I09 and the location where, said metal strap 44 passes through the punching and cutting dies. Thisdistance through which the metal strap 44 must beguided is variabledue to the reciprocatory. movement of. the carriage, and the metal strap 44 is advanced past this location 'by'pushing. Consequently if said strap 44 is not properly supported at this location it will bend and buckle. The guide means provided for the metal strap 44'at this location comprises two straight fiat plate'members I23, see Figs. 19 and 20, supported in spaced apart relation by spacer means I24 and adapted to receive the strap member 44 therebetween. Two plate members I23 have their inner end portion supported on a common pivot I25 which is secured to a fixed part of the machine as to theT bar 24; These plate members I23 have a longitudinally extending slot I26 through which a pin I21 is slidably and operatively disposed. The pin I21 is supported in a guide means I28 which is secured to the carriage plate- I03. passes from the jaw members I08 and I09 to the guide means I28 and enters between the plate members I23 at the location of said guide means I28. The pivot 'I25'is positioned on one side of the path of the metal strap 44 and thepin I21; which extendsthrough the slot I26 in the plates I23, is positioned on the other side of the path of said metalstrap 44. When the carriage assembly is at the outer limit of its stroke, the plate members I23 will be positioned almost parallel with the track bar I06, asshown by full lines in Figs. 3 and 19, and the strap member 44 will be supportedbetween said plate members throughout substantially the entire distance between the jaw members I08 and I09 and the adjacent punch and cut off unit 31 or 38. As the carriage assembly is moved inwardly the plate members I23 will be moved angularly about the pivot I25 until they occupy a position at a substantial angle to the track bar I06, see dot and dash line position, Fig. 19. when the carriage is at the innermost limit of its travel. Throughout the inward movement of the carriage the plate members will always support the metal strap 44 and prevent it from bending and buckling while said metal strap member is being pushed inwardly preparatory to the next nailing, punching and cut off operation. v

A strap grippingrdevice, see Fig. 4, is positioned just outwardly from each punch and cut ofi unit. Each of these strap gripping devices is. adapted to permit free inward movement of the. metal strap therethrough, but to prevent outward movement of said metal strap therethrough. Each of these strap gripping devices comprises a fixed frame 130 having a fixed jaw I3I and a movable jaw I32 mounted 'on a pivot I33. A lever.

arm I34 is connected with the movable jaw I32 and a weight. I35 is provided on the lever arm I34 to hold the movable jaw I32 in contact with the metal strap 44. When themetal strap 44 is pushed inwardly by inward movement of the carriage it will move freely through the jaws I3I and I32, but when the carriage is moved outwardly the jaws HI and I32 will grip and hold the metal strap and prevent'outward or retractile movement of said metal strap on the outward movement of the carriage.

Two fixed spaced apart guide plates I36 and I31, see Figs. 4 and 29; are provided for the metal strap member 44 between each punch and cut off unit and the adjacent nailing unit. A curved spring member I38 (Figs. 2, 4, and 29) is'secured, by a bolt I 39, to the upper guide plate I31 near the nailing unit and extends outwardly and downwardly in front of the guide space formed between said guide plates. This spring I38 helps to guide'and position the metal strap member as The metal strap member 44 said strap member is being pushed into the proper position for nailing and said spring is suffi'ciently flexible so that it will yield enough to release the strap member 44 after said strap member has been nailed to a band stick 26 and cut off and when said band stick 26, together with the strap member, is moved forwardly in the machine by forward movement of the feeder bars 28. A portion I4I 'of said spring I38 is partially cut loose fromthe spring I38 by a slot I40 and is bent outwardly so that the end portion of the metal strap will be deflected into proper position in the guide members if it engages with said outwardly bent portion I4 I One type of driving mechanism which may be used. in connecion with this machine is sOme-J what diagrammatically shown in Figs. 1,2, 3 and 21. This driving mechanism comprises a motor I42 havinga shaft I43 provided with a gear pinion I44 which meshes with a relatively large gearwheel, I45. The gearwheel I45 is secured to a shaft I46 which also has a gear pinion I41 secured thereto. A larger gearwheel I48 meshes with the pinion I41. Another'gearwheel I49 is fixedly connected with the larger gearwheel I48 and meshes with still another gearwheel I50 which is secured to the shaft 34. The shaft 34 is connected by bevel gears I5I with a shaft I52, which extends toward the front of the machine. A crank I53 is secured to the forward end of the shaft I52. Two links I54 and I55 are connected with the crank I53. The link I54 extends in a generally horizontal direction and is connected with a downwardly extending lever I56 which is secured to an oscillatory shaft I51. 1 An upwardly extending lever 158 on the oscillatory shaft I51 is connected by alink I59 with a' downwardly extending lever I60 on another oscillatory shaft I6I which is positioned on the opposite side of the machine, whereby the two oscillatory shafts I51 and I6I are connected together for simultaneous movement in opposite angular directions. The two oscillatory shafts I51 and NH extend toward the'rear portion of the machine and are respectively provided with upwardly extending cranks I62 and I63. The cranks I62 and I63 are respectively connected with the connecting rods I21, which extendto the respective carriages or strap feeding deviceson the'two sides of the machine. This link and lever mechanism, just described, provides means for simultaneou'sly moving the two strap feeding carriages outwardly to grip a-new section of metal strap-44 and inwardly to feed said strap'44 into the ma chine in the proper position for nailing.

The link 155, which has one end connected with the crank I53, extends upwardly and is "pivotally connected with a lever I68 secured to a shaft I69,

which is also adapted to be oscillated. The shaft I 69 extends rearwardly and has another lever I64 secured thereto. The last mentioned lever I64 is connected by. a link I with a lever I65 on the end oflthe rock shaft 54, hereinbefore described, whereby said rock shaft will be oscillated synchronously with the movement of the strap feeding carriages.

The several shafts hereinbefore described are provided with suitable bearings, some of which are'designated by numeral I61 in Figs. 1, 2 and 3.

It will be understood that the driving mechanism hereinbefore described may be greatly modified andvaried Without departing from the spirit of the invention.

A modified form of one part of this driving mechanism is shown in Fig. 22. In this modified formzth'e crankshaft 34'"has anqaxiallyraligned spanner with f-sta-n'd'ardpractice these 'm'etal t straps 44 are cut off so that they are approximately eleven extensionfshait H!) which is connected with/one of the crank pins '32. This extension is provided with-a crank IH which is connected by an upright connecting rod or link H2v with the lever arm I66 on the rock shaft 54, the link H2 replacing the link L65 shown in Figs. 1,2, 3 and 21 and functioning in substantially the-same way. When the drive shown in Fig. 22 is used it re- -places' the parts I55,- l68, I65, l6 4'an'd' I65, shown in Figs. 1,2, 3 and-21.

In'Figfiz-l'have illustrated alternative means for securing a metal strap member 44' to a band l stic'k26 by theuse of one nail 63, insteadof two nails. In accordance with the disclosure in'Fig'. 24 one nail 53 is driven through the strapmember '44 into the band stick .26 near the end 'of the strap member and the strap member 44 is punched at a location outwardly from the nail 63 to;partial1y cut loose a piece I13 of said strap member and bend said piece l'l3' downwardly and outwardly and embed it'in the wooden band stick; The chief function of the downwardly bent piece I13 is to preserve the vcorrect. alignment o'f'ithe strap member 44 an'dbandstick 26 so that the band stick with the strapmembers 44 thereon is maintained in the most compact 'form for hanv dling and'in the most convenient form for use by the shingle packer. The downwardly =bent piece llaalso offers-some resistance to forces tending'to pull the strap member'loosefrom' the bundle byan endwise pull on-the strap member.

When the strap member 44 is to bepunched, as

shown iirFig. 24, one of the nail driving plungers 59 is replaced by a punch memberll4=whichhas an inclined punching end I15. When the punch memberl'l'4 is used then chuckjaw'means I16 of I modifiedshape is provided in place of the chuck I jawvmeans 65 and ,66, said chuck jaw means llii being suitably'shapedjtoguide the punch member I14. Preparatory to operating this machine the bandstickmagazine 2'l'is supplied with band sticks'ifi; two rolls I02 otmetal strap material "44' are provided .and the metal strap 44 of each roll is'prope'rly threaded'into the respective carriage or strap feeding means. Also the nail boxes '52 are 'supplied with nails (i3. When the motor 542 is started and the machine put into operation-the nails 63 will be fed to the nailing units, the band sticks 28 will be moved into nailing position, the metal strap members 44 will be'properly positioned with their end portions in overlapped relation relative to the end portions of the'band sticksfthe nails'will be driven, the metal straps will be cut ed and punched and the'band sticks withthe metal straps nailed to the endportionsthereof will be pushed forwardly and eventually discharged from the machine.

Ina cycle of the machine the several opera- I tions will overlap in some'instances, but will preferably occur in substantiallythe following order, it being assumed to begin with that thecarriages or strap'feeding devices are at the innermost limit of their movement. At this time a bandstick'zfi will be correctly positioned for nailing and the ends of the metal straps 46 will be correctly posi tioned above said band sticks. As the carriages move outwardly the nailing plungers and the punch and cutter members'will move downwardly, thus simultaneously nailing the inner end portions of the metalstraps 44 to the band stick 3% and punching and cutting off said metal strapsiat a predetermined distance outwardly from therespective ends of the band'stick. In accordance inches long. While the nailing plungers, punches, and cut *off devices are doing their work, the carriages are being moved outwardly and the band stick feeder arms 28 are being moved rearwardly so as to allow another band stick 261to drop down? onto the angle members i. 25. As the .naillngbluhgers, punches and out off devicesare being moved upwardly, the carriages complete their outward travel and start to move inwardly, the jaw members I08 and M9 take band stick feeder bars 28 start to move forwardly preparatory'to moving the next band stick 2% into position for nailing. -While the nail driving hold of "the strapsl44- at a new-location preparatoryto 'feeding said straps M- inwardly and the plungers .5fi are moving downwardly, the cam 91 engages with the plate 88 and moves the bar 93 to the right from the'position shown in Fig. 10, far enough to start another nail moving downwardly in eachtube M. not retracted far enough'to be clear of the nails by the time'the nails reach the passageways 60,

the nails will'be momentarily stopped but will drop intothe'passageways 6!! as soon as the plungers are retracted far enough to leave the passageways 62 clear thus supplying another nail to each nail chuck-to be used in the next naildriving'operation-g After the machine is started his fully automatic in the nailing operation and will nail two pieces'ofmetal strap 44 to a band stick 26 at each cycle of operation, vAsthe cycles are of short duration this gives the machine avery large capacity. i v y l The ends ofthe metal ,st rapsd 'l which are naile'din the machine are not previously punched ,-as"1t has been'found' that the nails 635 will always f If the plungers are I support-wooden band sticks in a substantially horizontal position; reciprocable band stick feeding means positioned to intermittently move band 4 sticks in a direction transverse .totheir length on said supporting-means; la reciprocablemetal strap "feeding carriage positioned substantially in longitudinal alignment with a band stick which is supported on said supporting means and operableto intermittently feed a metal strap member intoa position with an end portion of the strapmember overlapping an end portion of the band stick; nail driving means positioned above the overlapped end portionsof said strap'mem- [her and said band stick; operating devices connected with said nail driving means moving said nail drivingn'leansto nail said strap member to sad band stickya punch and cut off means positio'ned at a predetermined distance from said nailrdriving means;' and devices operating'saidv punch and cut off means to cut ofi said strap member at a predetermined distance from the end of said band stick and to punch holes in said strap'membcr adjacent, the "cut off end thereof.

' .2. A machinero'f the class described, comprising a frame; two parallel spaced apart angle tending toward each other providing means whereon the end portions of band sticks may rest supporting the band sticks in substantially hori zontal position; band stick feeding means intermittently moving band sticks on said angle bars in a direction transverse to the length of the band sticks; track members on said frame projecting outwardly at substantially right angles from said angle bars; metal strap feeding carriages reciprooably supported on said track members positioned substantially in alignment with a band stick which is supported on said angle bars and operable to. feed a metal strap member'into a position of longitudinal alignment with a band stick with an end portion of the strap member overlapping an end portion of the band stick; nail driving means positioned above the overlapped end portions of said strap member and said band stick; operating devices connected with said nail driving means moving said nail driving means to nail said strap member to said band stick; a punch and cut as means positioned at a predetermined distance from said nail driving means; and devices operating said punch and cut oil means to cut 01f said metal strap member at a predetermined distance from the end of said band stick and to punch holes in said metal strap member adjacent the cut off end thereof.

3. A machine of the class described, comprising a frame; band stick supporting means positioned on said frame; band stick feeding means operable to move wooden band sticks, which are positioned in edge to edge relation, intermittently on said band stick supporting means in a direction transverse to their length; metal strap feeding carriages positioned at the sides of the path of movementof said band sticks; means supporting said carriages for reciprocation toward and.

away from the bandsticks in directions at right angles to the direction of movement of the band sticks; carriage reciprocating means connected with the carriages moving the carriages to feed metal strap members into end to end overlapped relation to the band sticks; nailing means nailing the overlapped end portions of the strap members to the band sticks;.and punch and cut oii means cutting oif the strap members to predetermined lengths and punching said strap members adjacent their cut off ends. i

4. A machine of the class described, comprising band stick supporting means operable to support a band stick; a reciprocable metal strap feeding carriage mounted for reciprocation toward and away from said band stick supporting means; a punch and cut off means positioned between said reciprocable carriage and said band stick supporting means; and an angular-1y movable metal strap guiding member operatively disposed between said punch and cut off means and said reciprocable carriage.

5. A machine of the class described, comprising band stick, supporting means operable to support a band stick; a reciprocable metal strap feeding carriage mounted for reciprocation toward and away from said band stick supporting means; a punch and cut off means positioned between said reciprocable carriage and said band stick supporting means; two spaced apart guide plates adapted to receive therebetween and guide a metal strap member, said guide plates having longitudinally extending slots therein; fixed pivot means positioned at one side of the path of movement. of a metal strap pivotally supporting one end portion of said guide plates adjacent said bars positioned on said frame with flanges ex feeding carriage mounted for reciprocation to- I ward and away from said band stick supporting means; a punch and cutoff means positioned between said reciprocable carriage and said band stick supporting means; a metal strap gripping member positioned adjacent said punch and cut off means operable to grip a metal straptending to move therethrough in a direction away from the band stick supporting means and to release a metal strap tending to move therethrough toward the band stick supporting means; and another strap gripping means on said reciprocable carriage operable to grip and advance a metal strap as said carriage moves toward said punch and cut off means and to slideover themetal strap as the carriage moves away from the punch a and cut oif means.

7. A machine of the class described, comprising band stick. supporting means positioned to support wooden band sticks in a substantially horizontal position; reciprocable band stick feeding means operative to intermittently move band sticks in a direction transverse to their length on said supporting means; a reciprocable metal strap feeding carriage positioned substantially in longitudinal alignment with a band stick which is supported on said supporting means and operable intermittently to feed a metal strap member into aposition with an end portion of the strap member overlapping an end portion of the band stick; nail driving means positioned above the overlapped portions of said strap member and said band stick operable to nail a strap member to a band stick; punch and cut off means positioned at a predetermined distance from said nail driivng means operable to cut oil the metal strap and punch holes adjacent the cut oif end of the same; a fixed metal strap guide between said nail driving means and said punch and out off means; a metal strap gripping member positioned adjacent said punch and cut off means operable to grip a metal strap if said strap tends to move away from the band sticks and to release a metal strap moving toward said band sticks; another strap gripping means on said reciprocable carriage operable to grip a metal strap as said carriage 'moves toward said band sticks and slideover the metal strap as the carriage moves in the opposite direction; and angularly movable metal. strap guiding means positioned between said reciprocable carriage and said punch and cut ofi means.

8. A machine of the class described, comprising a frame; band stick supporting meansv on said frame; two nailing devices supported by said frame in spaced apart relation and above said band stick supporting means; two punch and cut off devices supported by said frame in outwardly spaced relation relative to the respective nailing devices; two reciprocable metal strap feeding carriages positioned outwardly from the respective punch and out oif devices; a rock shaft positioned above said nailing devices and said punch and cut ofi devices and operatively connected therewith; nail supply means connected I l with said nailing devices; operating devices connecting said nail delivery means and said rock shaft; rock shaft actuating means operatively connected with said rock shaft; band stick supplymeans positioned to deliver band sticks to said band stick sup'portingmeans; said band stick moving means positioned to move band sticks' from'said supplymeans over said supporting means.

9. A machine of the class described, compris ing band stick supporting machines; and reciprocable strap feeding means operable to feed flexible metal strap toward said band stick supporting means, said strap feeding means combar member. a

said carriage plate, on said track means, two lever f arms pivoted on said carriage plate, two jaw members connected With the. respective lever armsadapted to receive'a metalstrap member and movableby angular movement of said levers to engage or disengage said strap, a bar slidably mounted on said carriage plate,-1inks connected with said bar and with the outer end portions of said levers respectively opening'and closing said jaws in response to longitudinal movement of. said bar, means limiting the movement in one direction of said bar, the movement of said bar in the other direction being limitedzby engagemenu of said jaws with the metal strap, and

carriage reciprocating means connected with said I LMURDOCK McLEOD. 

